Blow Off Valves & Diverter Valves for BMW 3 Series E90 (2006-2011)

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Adding a blow off valve or upgrading your diverter valves can change the sound of your vehicle and be an asset in big power setups.
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Active Autowerke - Corporate Logo
T#:4416
Part#: AABOVKIT-N54
Ships in 10 Business Days
$ 565.99 USD
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$ 565.99 USD
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As Used on Project E92 335i
When adding boost to the N54 engine, it's important to consider effects throughout the rest of the system. Additional boost can overwhelm the stock BMW diverter valve system and lead to boost leakage, or boost spikes, and lost horsepower. With the factory components in place it's hard to maintain consistently high boost levels. Instead of the weak plastic components of the stock system, Active Autowerke uses a CNC-machined and mandrel-bent aluminum tube with a Venturi blow-off valve in place of the original diverter valves. The blow-off valve dumps overboost into the atmosphere for that distinctive turbo 'whoosh' sound. The single AA BOV is over-sized for the N54 application - taking the place of the two small diverter valves, and verified to handle over 600hp. With the BOV acting properly your turbos and other components are protected from compressor surge caused by excess pressure build-up.

We like the Active BOV better than other forms of diverter and BOV kits because it's tried and true - AA was the original turbo BMW tuners and their experience is second to none. That's why they took the time to engineer their kit to fit perfectly, using the OE-type connector to the throttle body, and high-strength silicone to the lower intercooler tube. Each connection is a tight, leak-free seal. The kit comes complete with the discharge tube, vacuum plugs for the stock hoses, and instructions. The tube is powdercoated in black and with a wrinkle finish for an OE appearance.

This item fits the following BMWs with N54 engine:
2008-2010 E82 BMW 135i 1M
2007-2010 E90 BMW 335i 335xi 335i xDrive
2007-2010 E92 BMW 335i 335is 335xi 335i xDrive
2007-2010 E93 BMW 335i
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Genuine BMW - Corporate Logo
T#:19357
Part#: 11657556555
In Stock
14% off MSRP $ 109.99
$ 94.99 USD
Limited Qty Sale
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14% off MSRP $ 109.99
$ 94.99 USD
Limited Qty Sale
Free Shipping


Genuine BMW Tube, Turbocharger Bypass
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93

Fits BMW Engines including:
N54,N54T

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Forge - Corporate Logo
T#:377213
Part#: FMBM335DV1
Ships in 4 Business Days
$ 481.99 USD
Free Shipping on orders $49 and up

This alloy hard pipe fits to the throttle body and incorporates our high flow Blow off valve. This new valve fresh from our R&D department is the largest displacement valve that Forge have ever made ! Featuring a 50mm (2”) aluminium piston so that there are no issues with split diaphragms, we have not found the power handling limits of this valve yet ! The piston uses heat stabilised viton o-rings and high temperature Mobil 1 grease to ensure a long life with minimal wear and very long service intervals.

All parts are included in the kit, for your installation, along with comprehensive instructions.

This product fits the following BMWs:
2008 - 2013 E82 135i 
2007 - 2013 E9x 335i


 
 

 

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Active Autowerke - Corporate Logo
T#:397302
Part#: 15-003
Ships in 4 Business Days
$ 315.00 USD
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$ 315.00 USD
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Blow off valves are pressure relief systems that exist in most turbocharged engines. They allow compressed air to vent to the atmosphere, which saves wear and tear on your turbo and your engine. The Active Autowerke BOV is a pull-style BOV meant for high 500+ WHP BMWs. This BOV is made with an all aluminum cast body with a large single stage, steel pull-type valve to handle the extreme pressure discharge that comes with high boost applications. Engineered to hold up to 43 PSI.
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Genuine BMW - Corporate Logo
T#:19346
Part#: 11657556556
Ships Jul 1, 2025
Sale - Save 5% $ 173.00
$ 164.35 USD
Free Shipping
Sale - Save 5% $ 173.00
$ 164.35 USD
Free Shipping


Genuine BMW Tube, Turbocharger Bypass
This item fits the following BMW Chassis:
E82 1M Coupe,E82,E90,E92,E93

Fits BMW Engines including:
N54,N54T

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Genuine BMW - Corporate Logo
T#:37034
Part#: 11657601058
Ships Jul 1, 2025
Sale - Save 3% $ 183.99
$ 178.34 USD
Free Shipping
Sale - Save 3% $ 183.99
$ 178.34 USD
Free Shipping

The diverter valve is responsible for redirecting boost away from the intake when it's not needed. Other cars use a blow-off valve to vent the pressurized air into the atmosphere (the whoosh sound commonly heard on turbo engines) but BMW and other makers use a diverter valve to keep the air circulating through the intake for emissions purposes. A failing diverter valve will lead to a boost leak as turbocharged air leaks past the seals instead of going into the engine when you want it. This is a minor issue on stock engines but a bigger issue on tuned or heavily modded engines (those will use an aluminum diverter valve instead of the stock plastic). The factory diverter valve is plastic which is prone to cracking and electric which will fail without warning. This is a direct replacement diverter valve for cars with the N55 and S63 (X5M/X6M) engines.

N55 takes 1 diverter valve.
S63 takes 2 diverter valves (1 per turbo).

This item fits the following BMW Chassis:
E70 X5M,E71 X6M,E70 X5 X5,E71 X6,E82,E90,E92,E93,F06,F10,F12,F13,F15,F16,F22,F25 X3,F26 X4 X4,F30,F32,F33,F34,F36
S63 engine applies to X5M/X6M only. Fxx M5/M6 uses S63TU engine and does not use a diverter valve at all.

 

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Forge - Corporate Logo
T#:377212
Part#: FMBM335DV2
Ships in 4 Business Days
$ 796.99 USD
Free Shipping on orders $49 and up

This alloy hard pipe fits to the throttle body and incorporates dual high flow Blow off valves. These new valves, fresh from our R&D department are the largest displacement valves that Forge have ever made ! Featuring a 50mm (2”) aluminium pistons so that there are no issues with split diaphragms, we have not found the power handling limits of these valves yet ! The pistons uses heat stabilised viton o-rings and high temperature Mobil 1 grease to ensure a long life with minimal wear and very long service intervals.

All parts are included in the kit, for your installation, along with comprehensive instructions.

This product fits the following BMWs:
2008 - 2013 E82 135i 
2007 - 2013 E9x 335i

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Forge - Corporate Logo
T#:384401
Part#: FMDV-SHIM
Ships in 4 Business Days
$ 4.00 USD
Free Shipping on orders $49 and up
These shims allow you to manually adjust preload on Forge N54 Diverter Valves.

Genuine BMW - Corporate Logo
T#:28871
Part#: 07129905261
Ships Jul 2, 2025
Sale - Save 16% $ 3.99
$ 3.35 USD
Free Shipping on orders $49 and up
Sale - Save 16% $ 3.99
$ 3.35 USD
Free Shipping on orders $49 and up


Genuine BMW Torx-Countersunk Head Screw -
This item fits the following BMW Chassis:
E71,E82,E90,E92,E93,F06,F10,F12,F13,F15,F16,F22,F25 X3,F26 X4,F30,F32,F33,F34,F36

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